Bucket motor



Jan. 22, 1935. P. E. HARRISON 1,988,490

BUCKET MOTOR Filed Oct. 26, 1933 5 Sheets-Sheet l Jan. 22, 1935. P, E.HARRISON 1,988,490

BUCKET MOTOR Filed Oct. 26, 1933 5 Sheets-Sheet 2 lll P. E. HARRISONBUCKET MOIjOR Jan. 22, 1935.

Filed Oct. 26, 19315 3 Sheets-Sheet 5 A TTORNE Y.

Patented Jan. 22, 1935 UNITED STATES PATENT OFFICE BUCKET MOTORApplication October 26, 1933, Serial No. 895,247 2 Claims. (Cl. 118-43)This invention relates to the manufacture of rayon by the bucketprocess. More specifically the invention relates to an improved bucketand motor assembly. More generally the invention 5. relates to theconstructionof a motor driven centrifugal. Y

In the ordinary mounting of. the bucket used 7 in one process ofmanufacturing rayon, a spindle which is usually an extension of thebucket motor shaft is fitted with an adapter, or seat. The

seat has a cylindrical portion with a slight internal tapercorresponding to the taper of the spindle, and at the base of thecylindrical portion a circular ledge on which the hub of the bucketrests. The bucket is provided with a hollow hub in which hollow a bronzesleeve is fitted of such diameter as to provide a sliding fit with thecylindrical portion ,of the seat. Thefrictional resistance betweenthesleeve and the cylindrical portion of the seat, and between thebottom face of the bucket hub and the ledge of. the seat furnishes therequired force for driving the bucket. This type of connection requiresthat the base of the bucket be a considerable distance above the top ofthe motor. This distance, usually in the neghborhood of six or eightinches, is sumcient to permit the building up of serious strains on themotor and mountings whenever a bucket slightly out of balance is used.It is desirable, consequently, that a method of. mounting a bucket on amotor shall be devised which will bring the base of the bucket in closeproximity to the top of the motor. I

It is an object of this inventionto improve the bucket assembly used inthe manufacture of rayon by'the bucket process. Another object of theinvention is to provide a connection between a centrifugal bucket andits driving mechanism. Other objects of theinvention will be in partapparent and in part hereinafter described. l

' The objects of the invention are accomplished, in the preferred formofthe invention, by the use of a motor having a rotor, hollow at itsupper end, in which may be seated a stud projecting from the bottom ofthe bucket. The objects of the invention are accomplished in theirrespective degrees by the means, method, and detailsof'constructionhereinafter set forth.

In the drawings Figure 1 is a vertical section through a spinning bucketused in the manufacture of rayon showing the preferred form of theinvention. Figure 2 and Figure 3 are simpersons skilled in themanufacture of ilar views illustrating modifications of the invention.

In the drawings 10 is a spinning bucket; 11 is a spinning bucket cover;12 are holes through the sides of the spinning bucket providing for theescape of fluids during the manufacture of rayon; 13 is a circular studmounted in and projecting from the base of the bucket; 131 is a head onthe stud moulded (in this instance) into the base of the bucket servingto give improved lateral support to the bucket; 132 are lands on thestud and 133 are grooves on the stud; 14 is an annular guard moulded (inthis instance) into the base of the bucket. It will be understood thatit is not necessary to mould the stud and guard into the bucket but thatthey could be attached to the exterior of the bucket or could be aflixedto it in any other suitable way. 20 is a motor support; 21 is a motorframe; 210 are lugs toward the upper end of the motor frame; 211-212 areholes in the lugs and support, respectively, through which bolts orother attaching means may be passed; 22 is a rotor of the motor which ismounted to turn in a manner which will be understood by motors; 23 is acircular hole extending, in this instance, the entire length of therotor but which, need be only long enough to receive the stud of thebucket. The hole in the rotor is provided with lands and grooves ofwidth equal to the width of the grooves and lands, respectively, of thestud; 24 is a bevelled end on the rotor designed to make it easy "to fitthe stud and rotor together.

when the bucket is assembled in operating position on the motor, thelands and grooves of the stud fit into the grooves and lands of therotor. The guard 14 serves to prevent liquid thrown off by the bucketfrom getting inside the rotor or the motor.

In the modification of the invention shown in Figure 2, 30 is a support:31 is a motor mounting having an annular conical seat 32; 310 are holesin the mounting 31 through which bolts or other fastening means may bepassed; 33 is a motor housing having a conical base 34 which by fittinginto conical seat 32, furnishes a very firm and stable support for themotor and bucket; 15 is a bucket; l8 is the armature of the motor whichmay be of any desired type; 161 is a projecting end of the armature; 151is a seat, affixed to the shaft 161, furnishing a broad support for thebucket; 152 is a guard, perferably integral with seat 151, to preventdrip from seeping into the motor.

Although the form of the invention described in the preceding paragraphdoes not have some of the advantages inherent in the'preferred form ofthe invention, it does have the advantage of providing a means ofbringing the bucket close to the top of the motor.

In Figure 3, 17 is the rotor of a motor; 1'71 is a head on the rotorpreferably detachable therefrom, as by screw thread mounting 1'73; 172are holes in the" head; 18 is a bucket; 181 are studs projecting fromthe bottom of the bucket. V The studs on the bottom of the bucket andthe holes in the head are of equal size and equally spaced so that theone will fit the other when the bucket is in operating position.Alternatively, the holes could be sunk part way through the base of thebucket and the studs be on the head. I

In all the figures of the drawings 20 represents a bucket compartment ofordinary construction.

An advantage of the invention is that the base of the bucket is broughtcloser to the top of the motor than previous constructions of thisgenvibration imposing strain on the motors is greatly reduced. Anotheradvantage of this form of the invention is the elimination of theadapter used on standard assemblies. Another advantage is theelimination of the bronze lined hub found on standard assemblies. Otheradvantages of the invention will beapparent.

As many apparently widely different embodiments of this invention may bemade without departing from the spirit and scope thereof, it is to beunderstood that I do not limit myself to the specific embodimentsthereof except as defined in the appended claims.

I claim:

1. In a mechanism for themanufacture of artificial thread, a motor, acasing therefor, a

core mounted in the bearing and projecting through the casing, a buckethaving a stud, the stud and core being interfitting whereby the bucketmay be mounted on and driven by the motor, the length of the stud andthe projection of the core being such that the bucket is mounted withminimum lateral flexibility.

2. In a mechanism for themanufacture of artificial thread, a motor, acasing therefor,-

hearings in opposite sides of the casing, an arma-= whereby the bucketmay be mounted on and driven by the motor, the length of the stud andthe projection of the core being such that the bucket is rigidly mountedin close proximity to the bearing in the casing.

PAUL E. HARRISON.

15 bearing in the top of the casing, an armature v

